Bisque Misfire?

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Yesterday I fired my Paragon snf243 - attempting cone 05, no watcher - and I set the knobs incorrectly. They should have been 5 - 1- 2, for 5 -6 hours, but I did 1 - 1- 2 for 7 hours. I don't know why my brain wasn't working, but that's another problem entirely. The kiln sitter never tripped and the little cone doesn't appear to have bent.

Should I refire or assume that it still got pretty hot enough? What does that first (top) knob determine?